What is your take on self sustaining spaceships, space stations, moon stations, underground or both above and below, mars stations,( implications for astronomy and asteroid research, one of civilizations largest threats)small research stations or cities. And what implication do you think this focus for space exploration and expansion, and the self sustainability demands has/will impact civilizations on earth. In terms of eco system designed food forests, desert greening (easier than terraforming a planet like mars) , general food forestry, vertical farming and winter greenhouse culture, earthships etc..look up the work of Geoff Lawton, Michael Reynolds, hear out desert greening TED, little inventions like the waterboxx - how can it be optimized(?) Will edit later gotta go
I hear now you cover some of it and i had much more to say but I'm. Too high "on life" and drunk r.n. to comprehend what the duck am i even writing right now
The last few years have taught me that it's really no fun living under the thumb. Personally I now find the idea of living in a space habitat pretty troubling. Someone is going to own it, be it nation or a private company, and I'm guessing most people would just be a renter. The idea that the _terms and conditions_ can be changed on a whim.... not my cup of tea. It sounds like a place with the potential to get pretty despotic, pretty quickly. Plenty of advanced countries have gone lala at some point.
What if you owned it yourself? If radical life extension is on the table almost everyone today could be a ruling class that knows what living under a ruling class is like. All that would take is a few good investments. I bought my own house in 2017, making under $11 an hour. I worked at a job for a 8 years putting between 10-20% of my paycheck back in my 401k. A lot of 401ks have loan programs. That give you access to your savings to buy cars, property, even help you start a business. Looking into the future I do not see any reasons people in their 20 to 30s shouldn't expect to live until they are they 150 - 200 years at a very conservative estimate. Saving and compound interest would allow you to outright buy a cylinder even if you just had a day job and aggressively saved.
I was thinking about people doing space stuff In the Earth's ocean, including these generation ships My city nex to the beach, it looks natural to expand to the next density atmosphere Practicing for generations Epigenetics, people better able to deal with 0g And the life is quite alien, we can treat it the exact same way
Your absolutley right. Space wont be for everyone. I think living in space or mars or something, will be a noble pursuit. You do it to better yourself and our species. Thats what kirk and spock do.
One of the most important things is to reduce launch costs to the point at which the grand space projects and widespread civilian space travel and colonization become financially feasible.
I freaking _KNOW,_ RIGHT?!?!? Like for the video that came out right before this one (or possibly the next one further back-sorry, time is so screwy right now for me, but it's not actually important lol), I had started listening to John's sleep and relaxation playlist to wind down for that night, though not before checking the uploads page and finding that I was indeed up to date (no new videos), and just let it shuffle. A few videos had gone by, and as the next one was playing, I started thinking that it sounded like I was listening to a JMG video I missed, but I was chilling out and really enjoying the video while being comfortable in bed, so I didn't immediately check my phone to see what was up. And shortly thereafter, John starts talking about the James Webb Space Telescope having been successfully launched into space by the Ariane rocket, which of course it HAD, but like I said, I checked the uploads before I fired up and shuffled the playlist and there weren't any new ones. So at that point I get up and find that John had _definitely_ uploaded that video shortly after I started listening to the sleep playlist, and since he also added it to the playlist I was on, I got to be completely surprised by it! I definitely appreciated that hahaha, and that was only my story about the _last time_ JMG's legendary video timing really stood out for me, there have absolutely been plenty more before that 😂😎
I listen to you and Issac playlist to fall asleep to and then again next day when able to watch or catch up on what i missed. Thank you for the info and helping me have the least anxious and stress free bedtime mindset in years. The sleep is so good It affects every part of my next day.
You know, JMG, too many people complain that we spend too much with space while there's too much misery in the world... Which is true, but imagine how many jobs and wealth those constructions should create. Anyway... People who worry too much think too little, which is a real shame. Thanks for the video!!! Stay safe there with your family! 🖖😊
"Down and Out in the Magic Kingdom" is a fantastic story of a humanity that has integrated computer hardware into their biology so that they can back up their consciousness and, should they die, be brought back to life in a new body based on that backup. It also has the ability to upload their consciousness into machine bodies and explore space and the solar system as space vehicles themselves.
"Alien Camper Paradox." JMG, that was hilluarous! I'm going to add that as the first great filter to the new, Gordier Paradox. I could not stop laughing. Way to go champ and keep up the great work!
Brings to mind a bunch of aliens in tin foil hats and a big antenna mounted to the top of there colony sitting out in a little star system in the middle of a beam sandwich 🤣
Yep, it would be our luck that space travel is far less _Star Trek_ and far more RV park, with most exo-folks already having their elite trailers worked out while the rest of us are barely at the "van life" stage of affairs. :)
@john Propulsion technology to travel vast distances in space aside....I believe that energy shields would be just as important if not more important. Moving to another star system for example. Getting there quickly would be much needed but shielding the craft against space rocks and other things zooming around would be an absolute must. What are your thoughts concerning this?
Dense electromagnetic shields have indeed be proposed to feed off cosmic rays (gamma) + solar protons. Worth the energy expense. For human habs, lots of silicon, and iron out there to insulate from the previous zappers.
Thank you my favourite playlist on RUclips gets updated and JMG does it again. Oh how I wish a media company would hire you as a writer , presenter and producer of some science fiction and non fiction Tv shows or TV/ Documentary movies . I know your very busy im glad of that even if you are not . Thank you for sharing and giving .
Put a kilometer-wide, variable focus mirror on the far side of the moon, send ships across the solar system on highways of light in a matter of weeks, not months or years.
A wonderful episode! Some of the biggest challenges with regards to humanity's future in space comes down to philosophy- ultimately what will it be mean to be human? It's easy to speculate what a machine civilization might be like but much harder to emotionally wrap your mind around an existence like that. We're getting into transhumanism for sure. I can imagine an O'Neil Cylinder (however hard it may be to build) being created in such a way as to mimic the biomes of Earth, filled with trees, imported birds, flowers and simulated wind. And even on Earth we have tremendously urban areas where people don't interact much with nature. But while I love science and look forward to seeing what humans can do in the future, I think the biological components of humanity are a core part of us. There's no better way to understand this than to hike back into a remote mountain lake a hundred miles from the nearest electric light or human settlement. We can maybe remove humans from the Earth but if we remove the Earth from humans, do we still have something that's really human? Great stuff, thanks JMG!🚀🛰🔭🌌☄🙏
Since you bring up transhumanism, what do you think about a scenario like seen in "All Tomorrows" where the humans, after colonizing Mars and diverging as two species on two planets and going to war, engineer themselves to be "fit for inhabiting the stars" or something along those lines. They turned themselves into "Star People" and inhabited new bioligical bodies. Seemed like the implication also was that they might've had a biological leaning towards peace, since the decision was made after a gruesome war between Earthling Humans and Martian Humans.
Plants and crops can't really do everything themselves. They have dependency on various microbes in the soil and various insects on the ground or in the air. Although most are pests... To say we can do for example hydroponics in space and to leave out microbial life is a fallacy. We may simply need to take chunks of environment with us to space instead of efficiently taking pre-counted amounts of dirt, water and seeds, because we'll need more than that to make crops thrive enough to sustain population. First two to three cycles of crops would be fine, but sometimes soil becomes permanently starved of some elements after even 1 crop cycle, that's why we fertilize so much. Great video, I did sort of miss the "Mass Extraction From the Sun" idea, wish it was included. But I guess I can thank Isaac Arthur for that, haha.
I thought ion propulsion was to be the next big step in speedy astro-navigation? With our current tech, could we have a probe with enough Xenon and a mini nuclear reactor on board to reach the closest star systems?
You can use this in combination with things like the NERVA engine, there's already talk of doing just that. The NERVA design has been around since the early 60s and was actually tested using the Kiwi test bed (named as such as it was a flightless bird). The power output of the NERVA is very high and could actually reach Mars is just a month to a month and a half. People are worried that the ship going up would explode in the atmosphere spreading nuclear fuel, uranium, all over a large area which has been the main reason it hasn't been done. The variant of the NERVA would allow for a quick increase of speed through standard engine then switch the engine over to just producing electricity for powering the craft and powering an ion engine.
I suspect you've talked about it on this channel before, and maybe I missed it here, but no mention of active support? 🤔 I think it would've been worth mentioning for the space elevator segment or even a potential member of the list on its own! Enables things like launch loops too, or rail guns reaching much longer/higher to allow for slower, more biologically tolerable accelerations even from earth.
Good video. But did you forget hibernation systems. It’s a principle well founded in sci fi. IMO it’s a necessary technology for the effective colonies in our solar system.
A technology not mentioned, but one which could conceivably be something for spacecraft is field propulsion, electromagnetic to begin with, but maybe with other fields such as gravitational ones further down the line...
The light sail would work but most of the package would have to survive in hibernation until it reaches it's destination long after those who have sent are dead.
Not true. Gerard O'Neill's been dead since 1992. All of these ideas are far older than youtube and serve as the source material for anyone doing videos on them.
@@JohnMichaelGodier I'm well aware. Isaac is very careful about citing the sources of the ideas he discusses. I hope you didn't take my comment as sarcastic or snide - what I meant was that I genuinely enjoy the fact that my favourite youtubers give their own perspective on different ideas. It's fun to experience that spark of recognition when you bring up some megastructure or other and I think "ah yes, I remember this one, it's a cool concept"
I have a question: If we built a death star sized object in Low earth orbit, could we counteract the roche force by spinning it in the opposite direction relative to the direction of its orbit?
Beam powered rocket propulsion gives antimatter level performance potentially today for in space propulsion. Laser provides the energy to heat and accelerate a propellant. Skyhook tether of sufficient length CAN dip into the atmosphere b/c its orbital velocity can be at airliner speed with a tapered tether today.
The hard limit of phosphorous makes me think we'll have no choice but to become a machine civilization. It's a matter of how long we hold on to our biology in my opinion. On a side note if you replace neuron by neuron with a synthetic counterpart while the patient is awake, and kill the neuron it replaces, I see no paradox. Continuity of conscious is preserved, you just get a notification one day that the transition is complete. To the user, they will only notice more abilities become intuitive, and will probably need to be told that they no longer have any biological material left in their skulls. Then Humanity will be free to do as they wish, go out and explore the universe, or go In, and create synthetic environments for themselves. We are shockingly close to this, most wont see it coming until this tech is already here. Things are really about to pop off so to speak. Only if the world/ civilization doesn't end first that is
If we orr anything living persists for long enough, it's inevitable they will transition to post biological- wonder if they will cherish biology or just see it as a threat? My inclination is they would try to protect and shield them from the harsh realities of the universe- maybe by killing them all and putting them in some kind of simulation or similar
Hard limit of phosphorus on Earth right? What about phosphorus in space? Pretty sure there’s gotta be a whole lot more out there. That being said, modern agriculture requires fertilizers that require phosphates… which are lowering on Earth. So we might need new tech or mind phosphates in space
I think we will solve our phosphorus problem by using the Sun's Corona to make phosphorus. Would it take ridiculous amounts of power to do this? Absolutely, the even if we siphoned off a fraction of 1% of the Sun's power we could be post phosphorus scarcity for some time.
if we can get fusion power working on a large scale we can make phosphorus, or any other element. we can do it now, it just takes an enormous amount of energy
Late to the party, but if you wanna read good hard sci-fi with sky-hooks among other weird technologies, read Neal Stephenson's Seveneves. Actually even if you don't care about skyhooks, you should read it. It's long, and dense, so I wish I'd read the dead tree version instead of the audiobook (when he gets conceptual I often need to skip back a page or 5, or stop and chew on his idea for a while). It's really something. Also, do yourself a favour and avoid spoilers if you can.
Jumps to discussing the fantasy O'Neill cylinder and McKendree cylinders built with carbon nanotubes, while showing images if the O'Neill "Island One" and Stanford Torus, which are built with concrete and steel... Never mentions that these two are feasible now, could have been done by now.
I think the length of the elevator is less dependent on gravity than the distance to synchronous orbit. A Mars with a 10 hour rotation would require a much shorter tether than the 24h+ rotation it has due to the implied lower synchronous altitude. Please check my thinking.
21:10 The radiation on Mars is not going to be immediately fatal on the surface, even now. There might be a risk of ARS if you were out during a major solar storm, but I wonder about even that. (Feel free to provide correction on this point, in a civil way of course.) The bigger concern on Mars is GCR, but that's a long-term matter.
19:20 There’s another scenario. Aliens in their O’Neill “RV Park” may see coming and decide to charge us fees for staying at that particular place. We may also see alien HOA’s with an exhaustive list of rules.
What about Stephen Hawking's idea about miniature solar wind powered probes that could go to the Centauri system relatively quickly because of their size? Did I get that right?
One thing in regards to The Bitcoin Network and it’s limitations for interplanetary Monetary networks, the Blockchain can still be synced in earth orbit so if there’s O’Neil cylinders they will still be on the bitcoin standard
Combine the Dyson swarm idea with a shield for Venus, generating useable energy while shading Venus. The JWST has demonstrated how cold the shielded side can get. It would take centuries if not millennium to cool Venus down to Earth like temperatures. Using Dyson energy capture equipment would provide immediate benefits as opposed to the long period of changing Venus into a habitable world using a shade with no other use.
Initial momentum for a tether is imparted to a hefty mass counterweight using rockets. An outgoing ship takes some momentum away as it is raised. Incoming ships add tether momentum which is then used to raise an outgoing ship. The tether then has net zero momentum delta if the masses are equal. Some losses in energy will occur but is this highly efficient? I am seriously curious about the physics of this if anyone can respond who knows.
I wonder if it could be possible to create a magnetosphere on Mars within the planet, by creating a network of tunnels containing flowing, magnetic fluid. The fluid could be molten metal, or maybe a slurry of solid metal particles within a fluid. You would need to put this at a depth where the surrounding material in which the tunnel reside is solid, but the chosen material is liquid. And, of course, all materials used would need to be very cheap and easy to work with.
17:16 where I see this kind of technology going... I think we make ecologies. What better way to protect Earth biomes than transplant rare and endangered stock than a cylinder? Or... You can create a bunch of experiments. Like build a cylinder that is mostly sterile. Then populate it with prokaryotic life and studying how eukaryotic life came about. It is one of the most important questions in how our planet got to where it is today. Or we could make large stretches of designer biomes. Where we tweak living ecology. Like what would it be like to live on a cylinder that had carboniferous atomsphere?
You didn't mention Lagrange Points. There are gravity wells in between stars, so you could slingshot from star, to Lagrange Point, to planet, etc... just using gravity wells and celestial objects like a railroad. Would be more logical way of mapping space also, empty space is like the deep end of the pool, scary. Better to stay around the snack bar Slingshotting around a planet is like going straight if time is a line. That shortens the amount of time it takes to go a certain distance, by using inertia... so it is actually counter-intuitive to go in a straight line from star to star. Gravity and time are non-linear. They are a Cycle. So the shortest distance between 2 points in 4d, is like a circle I think, or maybe a figure 8. Every gravity field is like a speed accelerating arrow in Mario Cart, if used properly
0:57 light sails
2:28 nuclear propulsion
4:56 space elevators
7:52 skyhooks
10:18 rail guns and mass drivers
12:10 space docks
14:40 O'Neill and Mckendree cylinders
19:35 artificial magnetospheres
22:07 compact fusion reactor
24:30 genetic manipulation for space
Look up permaculture and grow food rather than lawns 🏡🌴☀️ 🌿🌳🍏🥜🌻🌻🍐🥦🍓🍠🌴🍊🌿🫑🍇🍎🍅🥒🌴🍓🌿🍐🥦🌳
Thanks for a great channel
What is your take on self sustaining spaceships, space stations, moon stations, underground or both above and below, mars stations,( implications for astronomy and asteroid research, one of civilizations largest threats)small research stations or cities. And what implication do you think this focus for space exploration and expansion, and the self sustainability demands has/will impact civilizations on earth.
In terms of eco system designed food forests, desert greening (easier than terraforming a planet like mars) , general food forestry, vertical farming and winter greenhouse culture, earthships etc..look up the work of Geoff Lawton, Michael Reynolds, hear out desert greening TED, little inventions like the waterboxx - how can it be optimized(?)
Will edit later gotta go
I hear now you cover some of it and i had much more to say but I'm. Too high "on life" and drunk r.n. to comprehend what the duck am i even writing right now
Edit later if i remember 😅
The last few years have taught me that it's really no fun living under the thumb. Personally I now find the idea of living in a space habitat pretty troubling. Someone is going to own it, be it nation or a private company, and I'm guessing most people would just be a renter. The idea that the _terms and conditions_ can be changed on a whim.... not my cup of tea. It sounds like a place with the potential to get pretty despotic, pretty quickly. Plenty of advanced countries have gone lala at some point.
What if you owned it yourself? If radical life extension is on the table almost everyone today could be a ruling class that knows what living under a ruling class is like. All that would take is a few good investments.
I bought my own house in 2017, making under $11 an hour. I worked at a job for a 8 years putting between 10-20% of my paycheck back in my 401k.
A lot of 401ks have loan programs. That give you access to your savings to buy cars, property, even help you start a business.
Looking into the future I do not see any reasons people in their 20 to 30s shouldn't expect to live until they are they 150 - 200 years at a very conservative estimate.
Saving and compound interest would allow you to outright buy a cylinder even if you just had a day job and aggressively saved.
I was thinking about people doing space stuff
In the Earth's ocean, including these generation ships
My city nex to the beach, it looks natural to expand to the next density atmosphere
Practicing for generations
Epigenetics, people better able to deal with 0g
And the life is quite alien, we can treat it the exact same way
Your absolutley right. Space wont be for everyone. I think living in space or mars or something, will be a noble pursuit. You do it to better yourself and our species. Thats what kirk and spock do.
What you describe sounds much like some of the HOA horror stories we hear of.
That's why we need communism
One of the most important things is to reduce launch costs to the point at which the grand space projects and widespread civilian space travel and colonization become financially feasible.
Sciencer scientifico
Hear me out... _Balloons._
I just searched your page to see if you had posted... a minute later I get that notification. Sir your timing is insane. Thanks John!
You saw the notification, swiped, and didnt really catch it. I do it all the time.
Yeah I love getting off work and finding new JMG/Event Horizon videos to watch at the end of the day
John has the same posting schedule every Thursday, give or take an hour or two-ish. You sir, Mr. Meat Fractals, are the one with impeccable timing.
I freaking _KNOW,_ RIGHT?!?!?
Like for the video that came out right before this one (or possibly the next one further back-sorry, time is so screwy right now for me, but it's not actually important lol), I had started listening to John's sleep and relaxation playlist to wind down for that night, though not before checking the uploads page and finding that I was indeed up to date (no new videos), and just let it shuffle. A few videos had gone by, and as the next one was playing, I started thinking that it sounded like I was listening to a JMG video I missed, but I was chilling out and really enjoying the video while being comfortable in bed, so I didn't immediately check my phone to see what was up.
And shortly thereafter, John starts talking about the James Webb Space Telescope having been successfully launched into space by the Ariane rocket, which of course it HAD, but like I said, I checked the uploads before I fired up and shuffled the playlist and there weren't any new ones. So at that point I get up and find that John had _definitely_ uploaded that video shortly after I started listening to the sleep playlist, and since he also added it to the playlist I was on, I got to be completely surprised by it!
I definitely appreciated that hahaha, and that was only my story about the _last time_ JMG's legendary video timing really stood out for me, there have absolutely been plenty more before that 😂😎
I listen to you and Issac playlist to fall asleep to and then again next day when able to watch or catch up on what i missed.
Thank you for the info and helping me have the least anxious and stress free bedtime mindset in years. The sleep is so good It affects every part of my next day.
lol i always fall asleep listening to these videos
Me too. He’s the bob Ross of speculative science.
I 'll never get tired of thanking you for uploading your videos the same moment I enjoy my morning, before-school, coffee!
You know, JMG, too many people complain that we spend too much with space while there's too much misery in the world... Which is true, but imagine how many jobs and wealth those constructions should create.
Anyway... People who worry too much think too little, which is a real shame.
Thanks for the video!!!
Stay safe there with your family! 🖖😊
"Down and Out in the Magic Kingdom" is a fantastic story of a humanity that has integrated computer hardware into their biology so that they can back up their consciousness and, should they die, be brought back to life in a new body based on that backup. It also has the ability to upload their consciousness into machine bodies and explore space and the solar system as space vehicles themselves.
I was craving a new J.M.G. video today and I got one! And a new Event Horizon episode as well! Thank you, sir!!!
Seeing your new uploads makes my day!
Always exciting to see a new upload from you!
"Alien Camper Paradox." JMG, that was hilluarous! I'm going to add that as the first great filter to the new, Gordier Paradox. I could not stop laughing. Way to go champ and keep up the great work!
Brings to mind a bunch of aliens in tin foil hats and a big antenna mounted to the top of there colony sitting out in a little star system in the middle of a beam sandwich 🤣
But do they have Good Sam stickers on their RVs?
Yep, it would be our luck that space travel is far less _Star Trek_ and far more RV park, with most exo-folks already having their elite trailers worked out while the rest of us are barely at the "van life" stage of affairs. :)
Hilarious
I appreciate the knowledge gained on this channel
You make learning fun!
Oooh the 81st person to watch it! getting better :D keep up the good work John! Love from across the pond!! Chris x
As always extremely interesting to listen to. Thank you for sharing!
@john Propulsion technology to travel vast distances in space aside....I believe that energy shields would be just as important if not more important. Moving to another star system for example. Getting there quickly would be much needed but shielding the craft against space rocks and other things zooming around would be an absolute must.
What are your thoughts concerning this?
Dense electromagnetic shields have indeed be proposed to feed off cosmic rays (gamma) + solar protons. Worth the energy expense. For human habs, lots of silicon, and iron out there to insulate from the previous zappers.
Glad you've given a shoutout to compact fusion reactors, John.
An hour earlier than usual! Thank you!
JMG all the way 🔥
Not only do you make fantastic videos, you also have the best fans with the best comments
"Corn immortality" ... Another great episode and set of closing thoughts 😁
Once again John you prove a valuable asset to RUclips
Thank you my favourite playlist on RUclips gets updated and JMG does it again. Oh how I wish a media company would hire you as a writer , presenter and producer of some science fiction and non fiction Tv shows or TV/ Documentary movies . I know your very busy im glad of that even if you are not . Thank you for sharing and giving .
Put a kilometer-wide, variable focus mirror on the far side of the moon, send ships across the solar system on highways of light in a matter of weeks, not months or years.
Maybe if nasa had an 800 billion budget
How would those ships stop at their destination? You'd either need powerful on-board propulsion systems or a similar installation at the target.
@@loganw3298 Ikr but its scary how easy we could even give them a 1 trillion budget if we wanted
Double upload Thursday's are my favorite!
yay happy Cody :)
A Thursday night treat. Thanks John
Oh my god it's 28 minutes fuck yeah
We need a Mass Effect!
Solar sail might be really great for station keeping, like in a Dyson swarm.
A wonderful episode! Some of the biggest challenges with regards to humanity's future in space comes down to philosophy- ultimately what will it be mean to be human? It's easy to speculate what a machine civilization might be like but much harder to emotionally wrap your mind around an existence like that. We're getting into transhumanism for sure. I can imagine an O'Neil Cylinder (however hard it may be to build) being created in such a way as to mimic the biomes of Earth, filled with trees, imported birds, flowers and simulated wind. And even on Earth we have tremendously urban areas where people don't interact much with nature. But while I love science and look forward to seeing what humans can do in the future, I think the biological components of humanity are a core part of us. There's no better way to understand this than to hike back into a remote mountain lake a hundred miles from the nearest electric light or human settlement. We can maybe remove humans from the Earth but if we remove the Earth from humans, do we still have something that's really human?
Great stuff, thanks JMG!🚀🛰🔭🌌☄🙏
Since you bring up transhumanism, what do you think about a scenario like seen in "All Tomorrows" where the humans, after colonizing Mars and diverging as two species on two planets and going to war, engineer themselves to be "fit for inhabiting the stars" or something along those lines.
They turned themselves into "Star People" and inhabited new bioligical bodies. Seemed like the implication also was that they might've had a biological leaning towards peace, since the decision was made after a gruesome war between Earthling Humans and Martian Humans.
Plants and crops can't really do everything themselves. They have dependency on various microbes in the soil and various insects on the ground or in the air. Although most are pests...
To say we can do for example hydroponics in space and to leave out microbial life is a fallacy. We may simply need to take chunks of environment with us to space instead of efficiently taking pre-counted amounts of dirt, water and seeds, because we'll need more than that to make crops thrive enough to sustain population.
First two to three cycles of crops would be fine, but sometimes soil becomes permanently starved of some elements after even 1 crop cycle, that's why we fertilize so much.
Great video, I did sort of miss the "Mass Extraction From the Sun" idea, wish it was included. But I guess I can thank Isaac Arthur for that, haha.
Perfect way to start the weekend with a new jmg vid
I was thinking about your videos for the past while, thanks for your content :)
By far my favorite page man. I check your page like a rat at a feeder bar hoping for new videos
Why was I subscribed to Event Horizon but not here? Whatever, it's corrected. Thanks John, I love your content!
I thought ion propulsion was to be the next big step in speedy astro-navigation? With our current tech, could we have a probe with enough Xenon and a mini nuclear reactor on board to reach the closest star systems?
You can use this in combination with things like the NERVA engine, there's already talk of doing just that. The NERVA design has been around since the early 60s and was actually tested using the Kiwi test bed (named as such as it was a flightless bird). The power output of the NERVA is very high and could actually reach Mars is just a month to a month and a half. People are worried that the ship going up would explode in the atmosphere spreading nuclear fuel, uranium, all over a large area which has been the main reason it hasn't been done.
The variant of the NERVA would allow for a quick increase of speed through standard engine then switch the engine over to just producing electricity for powering the craft and powering an ion engine.
the long videos are great 👍
Thursday is my favorite day of the week now :)
I suspect you've talked about it on this channel before, and maybe I missed it here, but no mention of active support? 🤔
I think it would've been worth mentioning for the space elevator segment or even a potential member of the list on its own! Enables things like launch loops too, or rail guns reaching much longer/higher to allow for slower, more biologically tolerable accelerations even from earth.
Great video, you explored some super interesting concepts. Looking forward to your next vid!
For some stupid reason, the US Navy discontinued its railgun development.
Cool video I'm glad you're doing longer videos again. :)
Love this stuff John, More long videos please!!
Another great video. Never gonna get tired of this!
I've come to the conclusion that orbital rings make space elevators obsolete. They should also be easier to build.
The outros are always 🔥😂
I feel like John read one of the Culture books before writing that part about rotating space habitats.
Rendevouz with RV .. they always come in Threes
The space nerd in me is dying as you talk about O'Niel cylinders and then we see Bernal spheres and Stanford Tori! 8-)
You are Truly my kinda weird Sir. And thank you for it.
Good video. But did you forget hibernation systems. It’s a principle well founded in sci fi. IMO it’s a necessary technology for the effective colonies in our solar system.
A technology not mentioned, but one which could conceivably be something for spacecraft is field propulsion, electromagnetic to begin with, but maybe with other fields such as gravitational ones further down the line...
that last one is so not hard to imagine, i kinda gotta wonder if it was secretly an ad
The light sail would work but most of the package would have to survive in hibernation until it reaches it's destination long after those who have sent are dead.
I sleep the best on nights John posts
I like how much of this is basically a summary of Isaac Arthur's early catalogue
Not true. Gerard O'Neill's been dead since 1992. All of these ideas are far older than youtube and serve as the source material for anyone doing videos on them.
@@JohnMichaelGodier I'm well aware. Isaac is very careful about citing the sources of the ideas he discusses. I hope you didn't take my comment as sarcastic or snide - what I meant was that I genuinely enjoy the fact that my favourite youtubers give their own perspective on different ideas. It's fun to experience that spark of recognition when you bring up some megastructure or other and I think "ah yes, I remember this one, it's a cool concept"
Fuck I needed this dude why is every bad day right after like 20 good days?! Why cant they just happen all at once?!?!?!
I have a question:
If we built a death star sized object in Low earth orbit, could we counteract the roche force by spinning it in the opposite direction relative to the direction of its orbit?
Thanks for the questions dude.
Beam powered rocket propulsion gives antimatter level performance potentially today for in space propulsion. Laser provides the energy to heat and accelerate a propellant.
Skyhook tether of sufficient length CAN dip into the atmosphere b/c its orbital velocity can be at airliner speed with a tapered tether today.
The hard limit of phosphorous makes me think we'll have no choice but to become a machine civilization. It's a matter of how long we hold on to our biology in my opinion. On a side note if you replace neuron by neuron with a synthetic counterpart while the patient is awake, and kill the neuron it replaces, I see no paradox. Continuity of conscious is preserved, you just get a notification one day that the transition is complete. To the user, they will only notice more abilities become intuitive, and will probably need to be told that they no longer have any biological material left in their skulls. Then Humanity will be free to do as they wish, go out and explore the universe, or go In, and create synthetic environments for themselves. We are shockingly close to this, most wont see it coming until this tech is already here. Things are really about to pop off so to speak. Only if the world/ civilization doesn't end first that is
If we orr anything living persists for long enough, it's inevitable they will transition to post biological- wonder if they will cherish biology or just see it as a threat? My inclination is they would try to protect and shield them from the harsh realities of the universe- maybe by killing them all and putting them in some kind of simulation or similar
Hard limit of phosphorus on Earth right? What about phosphorus in space? Pretty sure there’s gotta be a whole lot more out there. That being said, modern agriculture requires fertilizers that require phosphates… which are lowering on Earth. So we might need new tech or mind phosphates in space
I think we will solve our phosphorus problem by using the Sun's Corona to make phosphorus. Would it take ridiculous amounts of power to do this? Absolutely, the even if we siphoned off a fraction of 1% of the Sun's power we could be post phosphorus scarcity for some time.
if we can get fusion power working on a large scale we can make phosphorus, or any other element. we can do it now, it just takes an enormous amount of energy
@@willyreeves319 could you imagine us making our on phosphorus and antimatter, because we needed it.
Talk about Karachev 1+ problems.
On fire lately, John!
John my man, your ads were 3 min long rap tunes, obv louder too because ad volume, like all of them and they were every 5 mins ontop
What’s about magnetic sailing? Using the fieldlines of the sun with induction loops?
Late to the party, but if you wanna read good hard sci-fi with sky-hooks among other weird technologies, read Neal Stephenson's Seveneves.
Actually even if you don't care about skyhooks, you should read it. It's long, and dense, so I wish I'd read the dead tree version instead of the audiobook (when he gets conceptual I often need to skip back a page or 5, or stop and chew on his idea for a while).
It's really something. Also, do yourself a favour and avoid spoilers if you can.
John, great video. btw - what happened to Anna ? Did she encounter an existential crises 😉 ?
Jumps to discussing the fantasy O'Neill cylinder and McKendree cylinders built with carbon nanotubes, while showing images if the O'Neill "Island One" and Stanford Torus, which are built with concrete and steel...
Never mentions that these two are feasible now, could have been done by now.
C.clarke gets a shout-out for space elevators, shout out to Roald Dahl for the sky hooks ✊
Vacations of the future would be cool
I think the length of the elevator is less dependent on gravity than the distance to synchronous orbit. A Mars with a 10 hour rotation would require a much shorter tether than the 24h+ rotation it has due to the implied lower synchronous altitude. Please check my thinking.
In the Red/Green/Blue Mars trilogy, iirc, one of the Martian moons is used as the space end of the Mars space elevator.
2:26 You forgot about the ‘electric sail.’
You really need to interview Liftport about lunar elevators
What about light bridges (Halo), for special-use cases?
The best way to start out with space elevators may be to set up some for small bodies such as asteroids, and work up from there.
Martian Children of the Corn...lol
Nice!
18:06 - John added this in to see if you were paying attention!!
It seems like we are currently in the Bronze Age of space travel rather than the golden age tbh. Still though, great video.
21:10 The radiation on Mars is not going to be immediately fatal on the surface, even now. There might be a risk of ARS if you were out during a major solar storm, but I wonder about even that. (Feel free to provide correction on this point, in a civil way of course.) The bigger concern on Mars is GCR, but that's a long-term matter.
what an interesting thought about future extreme vacationers uploading their mind into a probe of some kind and skydiving into Jupiter or Saturn
Awesome as always! JMG is the the best
19:20 There’s another scenario. Aliens in their O’Neill “RV Park” may see coming and decide to charge us fees for staying at that particular place. We may also see alien HOA’s with an exhaustive list of rules.
This is a quality channel.
What about Stephen Hawking's idea about miniature solar wind powered probes that could go to the Centauri system relatively quickly because of their size? Did I get that right?
I'm hoping half the planet leaves for space so the rest of us have way more room, lol. ;)
Deorbit Ceres into a capture orbit for Mars. That will get the Ed dynamo going again.
One thing in regards to The Bitcoin Network and it’s limitations for interplanetary Monetary networks, the Blockchain can still be synced in earth orbit so if there’s O’Neil cylinders they will still be on the bitcoin standard
Combine the Dyson swarm idea with a shield for Venus, generating useable energy while shading Venus. The JWST has demonstrated how cold the shielded side can get. It would take centuries if not millennium to cool Venus down to Earth like temperatures. Using Dyson energy capture equipment would provide immediate benefits as opposed to the long period of changing Venus into a habitable world using a shade with no other use.
Love this
Initial momentum for a tether is imparted to a hefty mass counterweight using rockets. An outgoing ship takes some momentum away as it is raised. Incoming ships add tether momentum which is then used to raise an outgoing ship. The tether then has net zero momentum delta if the masses are equal. Some losses in energy will occur but is this highly efficient? I am seriously curious about the physics of this if anyone can respond who knows.
Thanks John 👍🏻
Is this John Michael Godier, futurist and science fiction author?
"Corn mortality..."
I'm going to have to think about that for a while...
2:30 there would be no “humans” there, maybe our creations but there is definitely a distinction to be made
I wonder if it could be possible to create a magnetosphere on Mars within the planet, by creating a network of tunnels containing flowing, magnetic fluid. The fluid could be molten metal, or maybe a slurry of solid metal particles within a fluid. You would need to put this at a depth where the surrounding material in which the tunnel reside is solid, but the chosen material is liquid. And, of course, all materials used would need to be very cheap and easy to work with.
17:16 where I see this kind of technology going... I think we make ecologies. What better way to protect Earth biomes than transplant rare and endangered stock than a cylinder?
Or... You can create a bunch of experiments. Like build a cylinder that is mostly sterile. Then populate it with prokaryotic life and studying how eukaryotic life came about. It is one of the most important questions in how our planet got to where it is today.
Or we could make large stretches of designer biomes. Where we tweak living ecology. Like what would it be like to live on a cylinder that had carboniferous atomsphere?
You didn't mention Lagrange Points. There are gravity wells in between stars, so you could slingshot from star, to Lagrange Point, to planet, etc... just using gravity wells and celestial objects like a railroad.
Would be more logical way of mapping space also, empty space is like the deep end of the pool, scary. Better to stay around the snack bar
Slingshotting around a planet is like going straight if time is a line. That shortens the amount of time it takes to go a certain distance, by using inertia... so it is actually counter-intuitive to go in a straight line from star to star.
Gravity and time are non-linear. They are a Cycle. So the shortest distance between 2 points in 4d, is like a circle I think, or maybe a figure 8.
Every gravity field is like a speed accelerating arrow in Mario Cart, if used properly
Trolling us with the sky hook
There is a hard science fiction anime about terraforming Mars called: Terraformars.
Look it up. Good stuff.
Yeeeeeeeah Boyeeeeeee!!!! New JMG!!!!!
Orbital rings!